Round your response to at least three decimal places If nece

Round your response to at least three decimal places.

(If necessary, consult a list of formulas.)

Solution

This is a binomial distribution:

p = .45, q = 1 - p = .55

The probability P{X} of exactly 3 customers from 5, will order food to go is:

P{X = 3} = (5 C 3)((.45)^3)((1 - .45)^2)

P{X = 3} = (5 C 3)((.45)^3)((0.55)^2)

=0.276